<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>文本格式化标签</title>
</head>
<body>
    <strong>加粗</strong>文字
    <br><em>倾斜</em>文字
    <br>我是<del>删除线</del>
    <br>我是<ins>下划线</ins>
</body>
</html>